System For Syringe Engagement To An Injector

Patent metadata

Field	Value
Publication number	US-2021052809-A1
Application number	US-202017073574-A
Country	US
Kind code	A1
Filing date	Oct 19, 2020
Priority date	Mar 19, 2014
Publication date	Feb 25, 2021
Grant date	—

Abstract

An injector system for injecting fluid includes a syringe and an injector. The syringe includes a body and a plunger movably disposed within the body. The plunger has at least one flexible leg extending toward the rearward end of the body. The injector has a housing with a front plate, a drive member at least partially disposed within the housing and operable to engage the plunger, and a syringe release assembly operable to release the syringe. The syringe assembly includes a syringe release gear that forms an enclosure for receiving the syringe when the syringe is fully seated within the housing and a plunger release tube surrounding at least a portion of the drive member. The plunger release tube has a first end rotationally engaged with the syringe release gear. Rotation of the syringe release assembly releases the at least one flexible leg from the drive member.

First claim

We claim:

1 . A syringe for interfacing with a fluid injector and a syringe release mechanism for releasing the syringe from operable engagement with the fluid injector, the syringe comprising:
an elongated tubular body comprising a rearward end and a forward end; a plunger movably disposed within the tubular body, the plunger having at least one flexible leg extending toward the rearward end of the tubular body and configured to be releasably connectable to a piston of the fluid injector; a syringe engagement flange positioned toward the rearward end of the tubular body and extending around a circumference of the tubular body, the syringe engagement flange comprising a syringe drive paw configured to engage the syringe release mechanism, wherein the syringe drive paw transfers movement imparted to the syringe by a user into the syringe release mechanism to release both the syringe and the plunger regardless of an axial position of the engaged plunger with the piston of the fluid injector.

2 . The syringe of claim 1 , wherein the movement imparted to the syringe by the user is rotational movement.

3 . The syringe of claim 2 , wherein the syringe release mechanism comprises a syringe release gear and a plurality of teeth arranged around an opening of the syringe release gear, wherein the syringe drive paw is adapted to engage the plurality of teeth of the syringe release gear such that the rotational movement of the syringe causes rotation of the syringe release gear via the engagement between the syringe drive paw and the plurality of teeth of the syringe release gear.

4 . The syringe of claim 1 , wherein the at least one flexible leg is operable to interact with a piston/plunger interface of the piston of the fluid injector.

5 . The syringe of claim 1 , wherein the syringe engagement flange extends completely around a circumference of the tubular body.

6 . The syringe of claim 1 , wherein the syringe includes a coaxial discharge injection section interconnected by an intermediate conical portion to the tubular body.

7 . An injector system for injecting a fluid, comprising:
a syringe, comprising:
an elongated tubular body comprising a rearward end and a forward end;
a plunger movably disposed within the tubular body, the plunger having at least one flexible leg extending toward the rearward end of the tubular body;
a syringe engagement flange positioned toward the rearward end of the tubular body and extending around a circumference of the tubular body, the syringe engagement flange comprising a syringe drive paw;
a fluid injector, comprising:
a piston operable to engage the plunger disposed within the syringe, the at least one flexible leg releasably connectable to the piston of the fluid injector such that the piston is operable to move the plunger within the tubular body;
a syringe release mechanism that forms an enclosure for receiving the syringe into the fluid injector, the syringe drive paw configured to engage the syringe release mechanism; and
wherein the syringe drive paw transfers movement imparted to the syringe by a user into the syringe release mechanism to release both the syringe and the plunger regardless of an axial position of the engaged plunger with the piston of the fluid injector.

8 . The injector system of claim 7 , wherein the movement imparted to the syringe by the user is rotational movement.

9 . The injector system of claim 8 , wherein the syringe release mechanism comprises a syringe release gear and a plurality of teeth arranged around an opening of the syringe release gear, wherein the syringe drive paw is adapted to engage the plurality of teeth of the syringe release gear such that the rotational movement of the syringe causes rotation of the syringe release gear via the engagement between the syringe drive paw and the plurality of teeth of the syringe release gear.

10 . The injector system of claim 9 , further comprising a plunger release tube surrounding at least a portion of the piston, the plunger release tube having a first end rotationally engaged with the syringe release gear and a second end opposite the first end,
wherein rotation of the syringe release gear rotates the plunger release tube and rotation of the plunger release tube causes a cam action at a release cam surface provided at the second end of the plunger release tube causing an axial extension of the plunger release tube relative to the piston such that the plunger release tube engages the at least one flexible leg and releases the at least one flexible leg from the piston.

11 . The injector system of claim 7 , wherein the at least one flexible leg is operable to interact with a piston/plunger interface of the piston of the injector.

12 . The injector system of claim 7 , wherein the syringe engagement flange extends completely around a circumference of the tubular body.

13 . The injector system of claim 7 , wherein the syringe includes a coaxial discharge injection section interconnected by an intermediate conical portion to the tubular body.

14 . A syringe mounting assembly, comprising:
a front plate for a fluid injector, the front plate defining a syringe-receiving opening; and a syringe release mechanism associated with the front plate, comprising:
at least one syringe latch mounted to a front side of the front plate for maintaining a syringe in operable engagement with the fluid injector, the at least one syringe latch configured to move from a closed position engaging the syringe to an open position when a force is applied and move from the open position to the closed position when the force is removed; and
a syringe release gear mounted to the rear side of the front plate and forming an enclosure around the syringe when the syringe is inserted into the syringe-receiving opening in the front plate; and
a syringe, comprising:
an elongated tubular body comprising a rearward end and a forward end;
a plunger movably disposed within the tubular body;
a syringe engagement flange positioned toward the rearward end of the tubular body and extending around a circumference of the tubular body, the syringe engagement flange comprising:
a sloping section configured to engage the at least one syringe latch; and
a syringe drive paw adjoined with the sloping section and configured to engage the syringe release gear,

wherein the sloping section is adapted to engage the at least one syringe latch to move the at least one syringe latch to the open position as the syringe is inserted into the syringe-receiving opening, and the syringe drive paw is adapted to engage with teeth of the syringe release gear as the syringe is fully seated within the enclosure formed by the syringe release gear, and wherein as the syringe drive paw moves beyond the at least one syringe latch as the syringe is fully seated within the enclosure formed by the syringe release gear, the at least one syringe latch moves to the closed position to retain the syringe.

15 . The syringe mounting assembly of claim 14 , further comprising at least one syringe release cam pin extending into a slot in the at least one syringe latch to apply rotational motion to the at least one syringe latch, and wherein rotation of the syringe once the syringe is fully seated within the enclosure formed by the syringe release gear causes rotation of the syringe release gear via the engagement between the syringe drive paw and the teeth of the syringe release gear which, in turn, causes rotation of the syringe release cam pin in the slot in the at least one syringe latch imparting the rotational motion to the at least one syr

Assignees

• Bayer Healthcare Llc

Inventors

• Lang Charles
• Swenglish Christopher
• Castillo Luis
• Schulte Stephen

Classifications

• A61M5/1458 Primary

  Means for capture of the plunger flange · CPC title

• A61M5/14546

  Front-loading type injectors · CPC title

• A61M5/14566

  with a replaceable reservoir for receiving a piston rod of the pump · CPC title

• A61M5/1456

  with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir · CPC title

• A61M2205/3306

  Optical measuring means · CPC title